<header class="navbar-dark yf-navbar fixed-top">
    <div class="container">
        <nav class="navbar navbar-expand-lg">
            <a class="navbar-brand" href="/">易风课堂（LOGO）</a>
            <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
                <span class="navbar-toggler-icon"></span>
            </button>

            <div class="collapse navbar-collapse" id="navbarSupportedContent">
                <ul class="navbar-nav mr-auto">
                    <li class="nav-item active">
                        <a class="nav-link" href="/">网站首页 <span class="sr-only">(current)</span></a>
                    </li>
                    <li class="nav-item">
                        <a class="nav-link" href="/list">课程列表</a>
                    </li>
                    <li class="nav-item">
                        <a class="nav-link" href="/linkus">联系我们</a>
                    </li>
                </ul>
                <div class="my-2 my-lg-0">
                    <a class="btn btn-light my-2 my-sm-0" type="登录">登录</a>
                    <a class="btn btn-danger my-2 my-sm-0" type="注册">注册</a>
                </div>
            </div>
        </nav>
    </div>
</header>
<div class="banner mt-0">
    <div id="carouselExampleIndicators" class="carousel slide" data-ride="carousel">
        <ol class="carousel-indicators">
            <li data-target="#carouselExampleIndicators" data-slide-to="0" class="active"></li>
            <li data-target="#carouselExampleIndicators" data-slide-to="1"></li>
        </ol>
        <div class="carousel-inner">
            <div class="carousel-item active">
                <img src="/home/images/banner1.jpg" class="d-block w-100" alt="...">
            </div>
            <div class="carousel-item">
                <img src="/home/images/banner2.jpg" class="d-block w-100" alt="...">
            </div>
        </div>
        <a class="carousel-control-prev" href="#carouselExampleIndicators" role="button" data-slide="prev">
            <span class="carousel-control-prev-icon" aria-hidden="true"></span>
            <span class="sr-only">Previous</span>
        </a>
        <a class="carousel-control-next" href="#carouselExampleIndicators" role="button" data-slide="next">
            <span class="carousel-control-next-icon" aria-hidden="true"></span>
            <span class="sr-only">Next</span>
        </a>
    </div>
</div>
